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Recent changes to lints disallowed lints from being emitted against code located
in foreign macros, except for future-incompatible lints. For a future
incompatible lint, however, the automatic suggestions may not be applicable!
This commit updates this code path to force all applicability suggestions made
to foreign macros to never be `MachineApplicable`. This should avoid rustfix
actually attempting fixing these suggestions, causing non-compiling code to be
produced.
Closes rust-lang/cargo#5799
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Misc cleanups
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Use a slice where a vector is not necessary
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Rollup of bare_trait_objects PRs
All deny attributes were moved into bootstrap so they can be disabled with a line of config.
Warnings for external tools are allowed and it's up to the tool's maintainer to keep it warnings free.
r? @Mark-Simulacrum
cc @ljedrz @kennytm
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Add `-Z borrowck=migrate`
This adds `-Z borrowck=migrate`, which represents the way we want to migrate to NLL under Rust versions to come. It also hooks this new mode into `--edition 2018`, which means we're officially turning NLL on in the 2018 edition.
The basic idea of `-Z borrowck=migrate` that there are cases where NLL is fixing old soundness bugs in the borrow-checker, but in order to avoid just breaking code by immediately rejecting the programs that hit those soundness bugs, we instead use the following strategy:
If your code is accepted by NLL, then we accept it.
If your code is rejected by both NLL and the old AST-borrowck, then we reject it.
If your code is rejected by NLL but accepted by the old AST-borrowck, then we emit the new NLL errors as **warnings**.
These warnings will be turned into hard errors in the future, and they say so in these diagnostics.
Fix #46908
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(pnkfelix updated to address tidy, and to change the buffer from
`Vec<DiagnosticBuilder<'errs>>` to a `Vec<Diagnostic>` in order to
avoid painful lifetime maintenance.)
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Fix loop label resolution around constants
And make `delay_span_bug` a little more helpful
r? @varkor
fixes #52442
fixes #52443
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Remove highlighting from secondary messages
Deemphasize the secondary messages so that all other highlights stand
out more.
<img width="684" alt="" src="https://user-images.githubusercontent.com/1606434/41261199-7b4fe96e-6d8f-11e8-8619-04d170617df2.png">
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Even if that is just happening because of `abort_if_errors`
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Enforce `#![deny(bare_trait_objects)]` in `src/librustc_errors`.
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Deemphasize the secondary messages so that all other highlights stand
out more.
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add suggestion applicabilities to librustc and libsyntax
A down payment on #50723. Interested in feedback on whether my `MaybeIncorrect` vs. `MachineApplicable` judgement calls are well-calibrated (and that we have a consensus on what this means).
r? @Manishearth
cc @killercup @estebank
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When suggesting code that has a shorter span than the current code,
account for this by keeping the offset as a signed value.
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Follow up to #50943.
Fix #50977.
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Some would argue that this 40-character method name is ludicrously
unwieldy (even ironic), but it's the unique continuation of the
precedent set by the other suggestion methods. (And there is some hope
that someday we'll just fold `Applicability` into the signature of the
"basic" method `span_suggestion`.)
This is in support of #50723.
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Move Range*::contains to a single default impl on RangeBounds
Per the ongoing discussion in #32311.
This is my first PR to Rust (woo!), so I don't know if this requires an amendment to the original range_contains RFC, or not, or if we can just do a psuedo-RFC here. While this may no longer follow the explicit decision made in that RFC, I believe this better follows its spirit by adding the new contains method to all Ranges. It also allows users to be generic over all ranges and use this method without writing it themselves (my personal desired use case).
This also somewhat answers the unanswered question about Wrapping ranges in the above issue by instead just punting it to the question of what those types should return for start() & end(), or if they should implement RangeArgument at all. Those types could also implement their own contains method without implementing this trait, in which case the question remains the same.
This does add a new contains method to types that already implemented RangeArgument but not contains. These types are RangeFull, (Bound<T>, Bound<T>), (Bound<&'a T>, Bound<&'a T>). No tests have been added for these types yet. No inherent method has been added either.
r? @alexcrichton
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This permits easier iteration without having to worry about warnings
being denied.
Fixes #49517
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Bump the bootstrap compiler to 1.26.0 beta
Holy cow that's a lot of `cfg(stage0)` removed and a lot of new stable language
features!
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Make queries thread safe
This makes queries thread safe by removing the query stack and making queries point to their parents. Queries write to the query map when starting and cycles are detected by checking if there's already an entry in the query map. This makes cycle detection O(1) instead of O(n), where `n` is the size of the query stack.
This is mostly corresponds to the method I described [here](https://internals.rust-lang.org/t/parallelizing-rustc-using-rayon/6606).
cc @rust-lang/compiler
r? @michaelwoerister
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Holy cow that's a lot of `cfg(stage0)` removed and a lot of new stable language
features!
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Always print `aborting due to n previous error(s)`
r? @michaelwoerister
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their parents instead.
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for multi-threaded code
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This crate moves the compiler's error reporting to using the `termcolor` crate
from crates.io. Previously rustc used a super-old version of the `term` crate
in-tree which is basically unmaintained at this point, but Cargo has been using
`termcolor` for some time now and tools like `rg` are using `termcolor` as well,
so it seems like a good strategy to take!
Note that the `term` crate remains in-tree for libtest. Changing libtest will be
a bit tricky due to how the build works, but we can always tackle that later.
cc #45728
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